I think we've all met folks like the one who made that comment ("revolvers are a niche with mostly collectors and diehards"), either live or on the internet. They happen to have found a type or brand of firearm that they like a lot, but for some reason, they seem to need everyone else to agree with them.
I met one of those guys on a different web site: he loves Glocks AND he's one of those folks who thinks that the 10mm Auto is the best cartridge in the universe, past, present and future. So, he's not shy about telling anyone who carries anything else for bear protection, that they're living in the Dark Ages - even folks who have lived in Alaska for 50 years or better, and know from actual experience what works for them. "Mr. 10mm Glock" is more than happy to tell 'em just how clueless they are!
And it's not just Glock guys, or 10mm guys, or 1911 guys, or Colt revolver guys, or whatever. A lot of us have strong opinions about certain subjects, and are probably way too inclined to just TELL somebody something, rather than discuss it in a way that's friendly and not offensive. (For me, it's gun control politics, having worked out in California for too many years, and also in Colorado when they passed their big ban - folks talking about some government-defined "legitimate need" to own a firearm can really set me off! I do hereby apologize to everyone on this forum!!)
Some folks like their revolvers, others like their auto pistols - buy what YOU like, if it's legal and fits your needs!
As always, IMHO, FWIW, YMMV, etc., etc.
